Search Results - "Thome, Kathreen E."

Virtual Tokamak for Test and Development of Plasma Control Applied to NSTX-U by Welander, Anders S., Wehner, William P., Pajares, Andres, Thome, Kathreen E.

“…Safe and efficient operation of Tokamak experiments depends on shot preparation before the experiment to maximize performance and avoid issues that are…”
Get full text

Nonlinear, real-time optimization for actuator management in tokamaks by Pajares, Andres, Thome, Kathreen E., Schuster, Eugenio, Walker, Michael L., Humphreys, David A.

Get full text

Nonlinear, real-time optimization for actuator management in tokamaks by Pajares, Andres, Thome, Kathreen E., Schuster, Eugenio, Walker, Michael L., Humphreys, David A.

“…Experiments in DIII-D have been carried out to test a novel actuator management approach in tokamaks. Here, the actuator management scheme is posed as a…”
Get full text

Robust Avoidance of Edge-Localized Modes alongside Gradient Formation in the Negative Triangularity Tokamak Edge by Nelson, Andrew  O., Schmitz, Lothar, Paz-Soldan, Carlos, Thome, Kathreen E., Cote, T.  B., Leuthold, N., Scotti, F., Austin, Max E., Hyatt, Alan, Osborne, Thomas

“…In a series of high performance diverted discharges on DIII-D, we demonstrate that strong negative triangularity (NT) shaping robustly suppresses all…”
Get full text

Isotope impact on Alfvén eigenmodes and fast ion transport in DIII-D by Van Zeeland, Michael A., Bass, E., Du, Xiaodi D., Heidbrink, William W., Chrystal, Colin, Crocker, C., DeGrandchamp, Genevieve, Haskey, Shaun, Liu, D., Gonzalez-Martin, Javier, Thome, Kathreen E., Yu, Guanying, Zhu, Y.

“…Measurements of beam driven Alfvén Eigenmode (AE) activity in matched deuterium (D) and hydrogen (H) DIII-D plasmas show a dramatic difference in unstable mode…”
Get full text

The role of isotope mass on neutral fueling and density pedestal structure in the DIII-D tokamak by Chaban, Ryan A., Mordijck, S., Rosenthal, Aaron M., Bortolon, Alessandro, Hughes, Jerry W., Knolker, Matthias, Laggner, F. M., Osborne, T. H., Schmitz, Lothar, Thome, Kathreen E., Wilks, Theresa M.

“…Experimental measurements on DIII-D of hydrogen neutral penetration lengths (λn0) on the high field side (HFS) are longer by a factor of $\sqrt{2}$ than for…”
Get full text

The role of isotope mass on neutral fueling and density pedestal structure in the DIII-D tokamak by Chaban, Ryan A., Mordijck, Saskia, Rosenthal, Aaron Michael, Bortolon, Alessandro, Hughes, Jerry W., Knölker, M., Laggner, Florian M., Osborne, Tom H., Schmitz, Lothar, Thome, Kathreen E., Wilks, Theresa M.

“…Abstract Experimental measurements on DIII-D of hydrogen neutral penetration lengths (λ n 0 ) on the high field side are longer by a factor of √2 than for…”
Get full text

On the origin of the DIII-D L-H power threshold isotope effect by Callahan, Kyle, Schmitz, Lothar, Carter, Troy A., Belli, Emily A., Chrystal, Colin, Haskey, Shaun R., Grierson, Brian A., Thome, Kathreen E., Smith, Sterling P., McKee, George R., Staebler, Gary M., Holland, Christopher, Ashourvan, Arash, Yan, Zheng

“…The increased low to high confinement mode (L to H-mode) power threshold PLH in DIII-D hydrogen plasmas (compared to deuterium) is shown to result from lower…”
Get full text

Understanding the L-H isotope effect at the DIII-D tokamak and advancements in synthetic turbulence diagnostics by Callahan, Kyle, Schmitz, Lothar, Pratt, Quinn, Carter, Troy A., Wang, Guiding, Zhang, Haiping, Holland, Christopher, Haskey, Shaun R., Angulo, Adrianna, Bortolon, Alessandro, Effenberg, Florian, Belli, Emily A., Chrystal, Colin, Thome, Kathreen E., Ashourvan, Arash, Neiser, Tom, Knölker, M., Khabanov, Filipp, Yan, Zheng, McKee, George R., Chaban, Ryan A., Wilcox, Robert S., Holm, Andreas, Scotti, Filippo, Truong, Dinh, Gerrú, Raúl

“…It is determined that while heat flux differences between hydrogen and deuterium isotope experiments result from natural differences in carbon impurity content…”
Get full text

Isotope impact on Alfvén eigenmodes and fast ion transport in DIII-D by Van Zeeland, M.A., Bass, E., Du, X.D., Heidbrink, W.W., Chrystal, C., Crocker, C., DeGrandchamp, G., Haskey, S., Liu, D., Gonzalez-Martin, J., Thome, K.E., Yu, G., Zhu, Y.

“…Measurements of beam driven Alfvén Eigenmode (AE) activity in matched deuterium (D) and hydrogen (H) DIII-D plasmas show a dramatic difference in unstable mode…”
Get full text

The role of isotope mass on neutral fueling and density pedestal structure in the DIII-D tokamak by Chaban, R.A., Mordijck, S., Rosenthal, A.M., Bortolon, A., Hughes, J.W., Knolker, M., Laggner, F.M., Osborne, T.H., Schmitz, L., Thome, K.E., Wilks, T.M.

“…Experimental measurements on DIII-D of hydrogen neutral penetration lengths ( λ n 0 ) on the high field side (HFS) are longer by a factor of 2 than for…”
Get full text

Density wavenumber spectrum measurements, synthetic diagnostic development, and tests of quasilinear turbulence modeling in the core of electron-heated DIII-D H-mode plasmas by Pratt, Q., Hall-Chen, V., Neiser, T.F., Hong, R., Damba, J., Rhodes, T.L., Thome, K.E., Yang, J., Haskey, S.R., Cote, T., Carter, T.

“…Measurements of the turbulent density wavenumber spectrum, δ n ˆ e ( k ⊥ ) , using the Doppler Back-Scattering (DBS) diagnostic are reported from DIII-D H-mode…”
Get full text

On the origin of the DIII-D L-H power threshold isotope effect by Callahan, K.J., Schmitz, L., Carter, T.A., Belli, E.A., Chrystal, C., Haskey, S.R., Grierson, B.A., Thome, K.E., Smith, S.P., McKee, G.R., Staebler, G.M., Holland, C., Ashourvan, A., Yan, Z.

“…The increased low to high confinement mode (L to H-mode) power threshold P L H in DIII-D low collisionality hydrogen plasmas (compared to deuterium) is shown…”
Get full text

Understanding the L-H isotope effect at the DIII-D tokamak and advancements in synthetic turbulence diagnostics by Callahan, K.J., Schmitz, L., Pratt, Q., Carter, T.A., Wang, G., Zhang, H., Holland, C., Haskey, S.R., Angulo, A., Bortolon, A., Effenberg, F., Belli, E.A., Chrystal, C., Thome, K.E., Ashourvan, A., Neiser, T., Knolker, M., Khabanov, F., Yan, Z., McKee, G.R., Chaban, R., Wilcox, R.S., Holm, A., Scotti, F., Truong, D., Gerrú, R.

“…It is determined that while heat flux differences between hydrogen and deuterium isotope experiments result from natural differences in carbon impurity content…”
Get full text

High Confinement Mode and Edge Localized Mode Characteristics in a Near-Unity Aspect Ratio Tokamak by Thome, K E, Bongard, M W, Barr, J L, Bodner, G M, Burke, M G, Fonck, R J, Kriete, D M, Perry, J M, Schlossberg, D J

“…Tokamak experiments at near-unity aspect ratio A≲1.2 offer new insights into the self-organized H-mode plasma confinement regime. In contrast to conventional…”
Get full text

H-mode access and characteristics at near-unity aspect ratio on the Pegasus Toroidal Experiment by Thome, Kathreen E

“…The high-confinement (H-mode) operating regime is achieved at near-unity aspect ratio (A [special character omitted] 1.2) in the Pegasus Toroidal Experiment…”
Get full text

H-mode access and characteristics at near-unity aspect ratio on the Pegasus Toroidal Experiment by Thome, Kathreen E

“…The high-confinement (H-mode) operating regime is achieved at near-unity aspect ratio (A [special character omitted] 1.2) in the Pegasus Toroidal Experiment…”
Get full text